Hello,
Didn't experience probs with SD cards on Ulticontroller. I installed the controller immediatelly at assambly of the UM, so when upgrading the firmware to Marlin, it probably correctly installed for use of Ulticontroller straight away.
I do have an issue though, with SD cards, in Cura 13.03. After slicing a file i want to copy it directly on the SD card though this always throws the following error message at me "failed to copy file to sd card"
Any ideas?
Tnx!